Author Topic: Upgrading to 3 phase  (Read 1416 times)


  • Bristles
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  • Posts: 408
Upgrading to 3 phase
« on: July 11, 2015, 08:17:47 PM »
I now own a building in Illinois. I am hoping that I can put a machine shop in it. The largest obstacle is that it lacks 3 phase electrical. I have been asking around for upgrading the service to 3 phase and I get numbers like $15,000.

So my question to you fine folks is, have any of you done an upgrade and what did it cost you? I doubt that it will be as expensive as people say because there is a weld shop on one side and a grain processing plant on the other.


  • Handlebar Stache
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  • Posts: 1192
Re: Upgrading to 3 phase
« Reply #1 on: July 14, 2015, 02:06:25 PM »
Look up:

Don't upgrade the service. Buy one of those per machine.


  • Pencil Stache
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  • Posts: 587
Re: Upgrading to 3 phase
« Reply #2 on: July 17, 2015, 08:25:47 PM »
I used one of these solid state converters from American Rotary for single phase to three phase.  I needed the ability to regen back to the grid under some circumstances and for long periods of time.  I never had any problem out of it.  Look at their industrial rotary line depending on how much HP your motors add up to if you don't need regen.  I used the phase perfect 20 (20 hp).


  • Stubble
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  • Posts: 153
  • Age: 30
  • Location: Texas
Re: Upgrading to 3 phase
« Reply #3 on: July 22, 2015, 04:13:05 AM »
I agree with Sokoloff. Rotary phase converter is a smart and affordable option.